C#

	StreamReader   reader = new StreamReader("Some Path");			<br />
	StreamWriter   writer = new StreamWriter( "Some Path", false );<br />
        string line;<br />
<br />
        while ( (line = reader.ReadLine()) != null )<br />
        {<br />
             if(some condition)<br />
             {<br />
               throw new ApplicationException("Unrecognised File Format");<br />
             }<br />
             .....<br />
             .....some more "if" conditions..<br />
<br />
             writer.WriteLine( "\n    {0} = {1},",  sometext, somevalue);<br />
        }<br />
        writer.Close();<br />
	reader.Close();